drm/amd/display: fix double free issue during amdgpu module unload

From Tim Huang
cf6f3ebd6312d465fee096d1f58089b177c7c67f in linux-6.6.y/6.6.55
20b5a8f9f4670a8503aa9fa95ca632e77c6bf55d in mainline linux

diff --git a/sys/dev/pci/drm/amd/display/dc/link/link_factory.c b/sys/dev/pci/drm/amd/display/dc/link/link_factory.c
index 33bb96f..eb7c9f2 100644 (file)
--- a/sys/dev/pci/drm/amd/display/dc/link/link_factory.c
+++ b/sys/dev/pci/drm/amd/display/dc/link/link_factory.c
@@ -403,7 +403,7 @@ static void link_destruct(struct dc_link *link)
        if (link->panel_cntl)
                link->panel_cntl->funcs->destroy(&link->panel_cntl);
 
-       if (link->link_enc) {
+       if (link->link_enc && !link->is_dig_mapping_flexible) {
                /* Update link encoder resource tracking variables. These are used for
                 * the dynamic assignment of link encoders to streams. Virtual links
                 * are not assigned encoder resources on creation.